Can Existing Corroded Coils Be Recoated?
Key facts
| Coil condition | Recommendation |
|---|---|
| Light white deposits, fins firm | Clean and recoat |
| Pitted fin edges, fins still firm | Clean and recoat; expect a shorter life than new |
| Fins flaking or loose on tubes | Replace |
| Refrigerant leaks from corrosion | Replace |
What recoating can do
A new coating slows further corrosion by keeping moisture and salt off the metal. It does not restore metal that has already been lost, reattach loose fins or seal leaks.
Cleaning is the hard part
Corrosion products and salt deposits must come off before recoating; coating over them traps the salt against the metal. On an installed coil this means careful chemical cleaning and thorough rinsing without bending the fins.
Field or workshop
Installed coils are recoated by spray with an air-dry system. Coils that can be removed are easier to clean and coat thoroughly.
What this means for your project
Photograph the coil faces and collars and send them with the enquiry. If the fins are still firm, recoating is worth pricing against replacement.
